北方交通
北方交通
북방교통
NORTHERN COMMUNICATIONS
2012年
4期
74-77
,共4页
斜拉桥%万吨级%牛腿%受力研究
斜拉橋%萬噸級%牛腿%受力研究
사랍교%만둔급%우퇴%수력연구
Cable stayed bridge%10%000 ton class%Bracket%Force research
以绥芬河斜拉桥转体施工为例,采用通用有限元程序对转体桥梁的重要结构—牛腿进行平转阶段受力研究。研究表明,牛腿在桥梁重力、预应力和牵引力共同作用下,整个结构呈现压应力为主的受力状态;预应力可使牛腿在桥梁转体发生意外倾斜时起到保险作用;牵引力对牛腿受力影响不大,但使牛腿产生了扭转趋势。根据牛腿各部分结构的受力特点及功能将牛腿划分成三个区域,即承重区域、保险区域和牵引区域。
以綏芬河斜拉橋轉體施工為例,採用通用有限元程序對轉體橋樑的重要結構—牛腿進行平轉階段受力研究。研究錶明,牛腿在橋樑重力、預應力和牽引力共同作用下,整箇結構呈現壓應力為主的受力狀態;預應力可使牛腿在橋樑轉體髮生意外傾斜時起到保險作用;牽引力對牛腿受力影響不大,但使牛腿產生瞭扭轉趨勢。根據牛腿各部分結構的受力特點及功能將牛腿劃分成三箇區域,即承重區域、保險區域和牽引區域。
이수분하사랍교전체시공위례,채용통용유한원정서대전체교량적중요결구—우퇴진행평전계단수력연구。연구표명,우퇴재교량중력、예응력화견인력공동작용하,정개결구정현압응력위주적수력상태;예응력가사우퇴재교량전체발생의외경사시기도보험작용;견인력대우퇴수력영향불대,단사우퇴산생료뉴전추세。근거우퇴각부분결구적수력특점급공능장우퇴화분성삼개구역,즉승중구역、보험구역화견인구역。
This paper take the Suifenhe cable bridge rotating construction as an example,using the general finite element program research the force of the bracket which is the important structure of the swivel bridge during the flat rotating period.The results show that under the resultant of forces of gravity,prestress and traction,the stress of whole structure of bracket presents compression stress based state;tilt accident happens when rotating the bridge,prestress can play the role of insurance to the bracket;Traction has little effect on the force of bracket,but it make the bracket having the trend to reverse.According to features and functions of every structures of the bracket,the force of the bracket will be divided into three areas,that load-bearing area,insurance area and traction area.
